The Foreign Exchange Constraint at the Heart of Development Finance

Summary

Why foreign exchange availability, balance of payments and project design must be reconciled now

Climate finance is development finance – on steroids

Climate finance is not a new category of funding. It is development finance scaled up and sped up, tasked with enabling accelerated capital replacement cycles across grids, industrial systems, mobility and housing in countries that did not complete the first wave of industrial capital formation.

But unlike traditional Overseas Development Aid (ODA) or infrastructure lending, today's climate finance leans heavily on global private investment. The volumes of funding required – trillions, not billions – are beyond the reach of public budgets alone, which means that returns must flow back to private investors. This return flow is denominated, almost exclusively, in foreign currency (FCY).

The structural imbalance arising from this situation may be laid bare thus: climate projects in developing countries are expected to import both financial and physical capital at scale, and then export returns, in hard currency, over decades. However, only a few developing countries can sustain this pattern without depleting their foreign exchange (FX) reserves or inducing macro stress.

The maximum rate of capital importation – and its FX payback horizon

Every country has a maximum sustainable rate of capital importation. This ceiling is dictated not by the ambition of planners, the optimism of financiers or the moral outrage of, say, environmentalists, but by the balance of payments (BOP). The more capital a country imports, whether in the form of turbines, solar panels, consulting services or debt, the more value it eventually must export to service payback obligations.

For the private investors backing up the system, this is not ideology; it is arithmetic. But it often comes with a cruel asymmetry:

If the project does not directly generate FX via commodity exports, carbon credits or new tradable services, then repayment depends on a central bank with sufficient reserves and the political willingness to allocate them to meet obligations. That willingness cannot be guaranteed, as the capacity of a central bank to act is often constrained.

FX availability is not a technicality – it is the investment thermostat

Much of the global discourse treats FX risks as a ‘mechanical’ problem – solvable with hedging products, blended finance or guarantees. This is a dangerous and deceptive framing. FX is either available or it is not; and finance does not stand apart in a splendid realm of its own – it subsists in an ecosystem, and more often than not succumbs to pressures within it. For when culture commands, politics conspires and economics coordinates, finance does not lead: It complies. Such is the nature of FX risk in many developing countries.

FX price risk may be hedged to protect project revenues. However, FX availability risk - i.e., whether dollars or euros can be physically accessed when needed – is a sovereign constraint. And no financial instrument can hedge a shortage of FX in economic reality.

The situation becomes acute in countries with:

Investors cannot build a 25-year project atop a 12-month FX liquidity outlook. Nor should they try to do so.

A Moment of reckoning: IMF BPM7 and the return of FX fundamentals

The impending 2025 launch of The International Monetary Fund (IMF) Integrated Balance of Payments and International Investment Position (BPM7) framework¹ seems quite timely. It is a major upgrade of the global standard for balance of payments accounting, and signals an opportunity to embed climate finance within a more realistic macroeconomic framework that recognises:

This comes just as US inflation remains sticky, long-term interest rates are rising, and world trade growth is slowing. In this environment, FX constraints will only intensify.

Climate ambitions, unless restructured, risk running aground in the shallows of BOP fragility.

Designing for the constraint: a new architecture of investment sustainability

We have to move from the illusion of FX-neutrality to an explicit FX-informed investment design paradigm that requires:

Concessional finance must be used not to hide FX risk, but to bridge real gaps in FX access and macro capacity.

Toward an FX-smart climate finance regime

Climate finance, if it is to be transformative rather than extractive, must acknowledge its dependency on the very thing it often overlooks: foreign exchange availability.

This does not mean abandoning ambition. It means grounding ambition in macroeconomic realism. Investors are not just betting on clean energy, digital infrastructure or low-carbon logistics. They are betting on the ability of countries to earn, retain and allocate FX consistently and predictably.

To scale climate finance, we must build a new deal between projects and macro policy: A deal that treats FX availability as a shared responsibility, and not someone else’s problem. This is going to require collaboration between investors and sovereign countries, and a commitment to cooperate. If multilateral development banks, development finance institutions, philanthropic and concessional capitalists are to play a role, there will be a vital need for countries to ensure that trust is assured and enforced as national economic reforms progress and realities improve.

In summary: If capital flows in as foreign currency, it also must flow out. If an economy cannot accommodate this cycle, no amount of green will make it bankable.

Endnotes

About the Author

Ebipere K. Clark

Ebipere K. Clark is a seasoned consultant specialising in capital markets, energy and infrastructure sectors, climate action policy and finance. He is the Managing Partner at Frontier-Alpha LLP and has held key advisory roles, including Special Adviser to the Governor of the Central Bank of Nigeria and Technical Adviser to the CEO of the Infrastructure Corporation of Nigeria (InfraCorp).